Clutch question, please help.

I use 20-50 Mobil in the Harley but that is a oil cooled engine. Been running Mobil 4-T since day one in the Rocket year round. Never had a problem. Back in 05 I bought a Bonneville and during that time frame the recommended oil by truimph was Mobil. Used Mobil in every bike since then.

Jag said:

As others have said, change that oil!!
You need 4T rating!! You are using the wrong oil!!! Your clutch will slip with the wrong oil!!

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Well I went ahead and took your (and others) advice and did an oil change with Motul 10w40 from the shop I use, Cycle Pro in Orlando. It appears to have reversed the slippage! Praise the Lord! I even hooked up my Lees-ure Lite camper (about 350 lbs with gear in it) and pulled it for a 150 mile trip. No slippage! However, I wasn't cranking down on the throttle to see if I COULD make it slip, but at least it did not slip. Also I got 33 mpg on the trip. Almost forgot to mention another thing; the clutch cable had somehow been adjusted to have zero freeplay. Once properly adjusted with a fair amount of freeplay, it improved immediately. So I don't know if was that or the oil change that fixed it, or a combination of both.

rocketrookie said:

Well I went ahead and took your (and others) advice and did an oil change with Motul 10w40 from the shop I use, Cycle Pro in Orlando. It appears to have reversed the slippage! Praise the Lord! I even hooked up my Lees-ure Lite camper (about 350 lbs with gear in it) and pulled it for a 150 mile trip. No slippage! However, I wasn't cranking down on the throttle to see if I COULD make it slip, but at least it did not slip. Also I got 33 mpg on the trip.

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Glad it's better. Next change try the 15w50 Motul 300V 4T especially since you are in a hot environment.